Spatial watermark for image content authentication.
Tiago Rosa Maria Paula QueluzPublished in: J. Electronic Imaging (2002)
Keyphrases
- spatial information
- spatial distribution
- single image
- image features
- spatial frequency
- input image
- geometric distortions
- image content
- image classification
- image processing operations
- image data
- image retrieval
- image representation
- image segmentation
- spatial relations
- spatial relationships
- multiscale
- digital watermark
- spatial arrangement
- image fidelity
- image authentication
- test images
- image blocks
- pixel values
- image regions
- edge detection
- watermarking method
- digital images
- multiresolution
- discrete wavelet transformation